Improvement in driving-mechanism for sewing-machines



N. Pm, FHDTO-UTHOGRAPHBL WASHINGTON. D. U.

JAMES B. AYER, OE ELIZABETH, NEWJERSEY.

Letters Patent No. 97,586, dated December 7,1869.

IMPROVEMENT IN DEIIING--MECHANISM FOR SEWING-MACHINES..

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom tt may concern:

Be it known that I, JAMES B. AYER, of Elizabeth,

in the county of Union, and State of New Jersey, havel invented a newand useful Improvement in Driving- Mechanism for Sewing and otherMachines; and I do hereby declare the following to be a full, clear, andexact description thereof, reference rbeing had to the accompanyingdrawings, making part of this specification, and in which- Figure lis afront elevation of my improvement, and

Figure 2, a vertical cross-section of the same. Similar letters ofIreference denote like parts in the different views. I A A is the frame,upon which rests the table B.

C is the belt-wheel, which turns upon an axis, a,

secured at right angles to, and at the extremity of a hanger, I).

Said wheel is provided with' a bevelled pinion, E, and is held upon theshaft by means of a pin or nut, b.

I is the driving-wheel, which is slightly. concave on one side, andconvex on the other, the latter provided with bevelled cogging, whichmeshes into the pinion E, and imparts motion to the belt-wheel C.

This wheel h is provided with right-angled spokes and hub, as seen atG,'g. 2, which are secured to the rim by meansof screw-bolts c c, andismounted upon a shaft, H, which has its bearings in two hangers, I I. Thewheel is free toi-evolve uponsaid shaft.

One e'nd of the shaft passes through one of the hangers, I', somedistance, and is provided with a ratchet-wheel, J', which is secured bya feather, or otherwise.

' rlhe shafts extremity is squared, and a key or crank applied thereto,for turning the' same, the hanger I having hung upon it a pawl, K, whichtakes into the ratchet,J, and holds ythe same from turning in but onedirection.

A spring, L, is fixed within the hollow wheel F, one end being securelyfastened to the axis or shaft H,

and the other looped around one of the bolts e, so that thespring beingwound up,'aud the brake' disengaged, as will be, presently described,power and motion are limparted to the wheelE.

M is a small hanger, to which is pivoted the brake N, one end providedwith a treadle-loop, (l, for lifting the other away from contact withthe periphery of the belt-wheel.

Over the contact or friction-end of this lever is arranged (upon theunder side of the table, and to which all the hangers are secured,) astrong spring, c, which holds the brake down upon the wheel` C.

Anotherhanger, 0,-extends down this spring, and is bent at right angles,and provided with a vertically-moving thumb-screw,'f, by means of whichthe amount of friction and speed may be regulated.

rIhe belt P, passing around the wheel C, is carried over the drive-wheelof the sewing-machine; and it is only necessary to wind up brake, whenthe model seamstress will begin her work. l

Having thus described the construction and operation of my improveddriving-mechanism,

What I claim, and desire to secure by Letters Iatent isl. The wheel F,constructed as described, and provided with the spring L, shaft H, andratchet J, in combination with the beltwheel Gand brake N, all arrangedand operating substantially as and for the purpose set forth.

2. Constructing the driving-wheel as described, and arranging within thesame the power, substantially in the manner and for thc purpose setforth.

3. In combination with the driving-mechanism, the brake N, forregulatingthe speed of the belt-wheel, substantially as described.

In testimony whereof, I have hereunto set my hand and seal, this 11thday of September, 1869.

JAMES B. AYER. [n s] Witnesses:

JOHN Non, A. D. MULFonn.

below the end ofthe spring, and lift the

